[Introduction]
To improve mobile productivity and streamline file access, Outlook for Android will soon support in-app PDF attachment previews. This update aligns with user feedback requesting faster, more integrated document viewing experiences without needing to switch apps.
This message is associated with Roadmap ID 520386.
[When this will happen:]
General Availability (Worldwide): Rollout begins in late November 2025 and is expected to complete by late December 2025.
[How this affects your organization:]
Who is affected:
- All users of Outlook for Android across commercial and education tenants.
 
What will happen:
- Users will be able to preview PDF attachments directly within the Outlook for Android app.
 - The built-in previewer will launch automatically when a PDF is opened.
 - Users can still choose to open PDFs in other apps via the overflow menu.
 - This feature will be enabled by default; no admin configuration is required.
 
[What you can do to prepare:]
No action is required. This feature will be enabled automatically.
Optional steps:
- Communicate this change to helpdesk staff to reduce potential support inquiries.
 - Update internal documentation if you reference mobile attachment handling.
 - If your organization prefers users to use a specific PDF viewer, consider communicating usage guidance.
 
[Compliance considerations:]
No compliance considerations identified, review as appropriate for your organization.
Source: Microsoft
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